EP1709652A1 - Switching device - Google Patents

Switching device

Info

Publication number
EP1709652A1
EP1709652A1 EP05701747A EP05701747A EP1709652A1 EP 1709652 A1 EP1709652 A1 EP 1709652A1 EP 05701747 A EP05701747 A EP 05701747A EP 05701747 A EP05701747 A EP 05701747A EP 1709652 A1 EP1709652 A1 EP 1709652A1
Authority
EP
European Patent Office
Prior art keywords
shaft
switching device
control
control shaft
working
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05701747A
Other languages
German (de)
French (fr)
Other versions
EP1709652B1 (en
Inventor
Rainer Kolmonen
Aki Suutarinen
Jarkko Alanen
Harri Mattlar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB Oy
Original Assignee
ABB Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ABB Oy filed Critical ABB Oy
Publication of EP1709652A1 publication Critical patent/EP1709652A1/en
Application granted granted Critical
Publication of EP1709652B1 publication Critical patent/EP1709652B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/02—Details
    • H01H19/03—Means for limiting the angle of rotation of the operating part
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/64—Encased switches adapted for ganged operation when assembled in a line with identical switches, e.g. stacked switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/42—Driving mechanisms, i.e. for transmitting driving force to the contacts using cam or eccentric

Definitions

  • Switching devices are instruments employed for opening and closing an electric circuit.
  • the switching device comprises at least one pole and a control device adapted to open and close said pole.
  • Switching devices include switches and switch-fuses, for example.
  • a switching device of a known type comprises a control shaft and a working shaft installed in a frame part, the control shaft being rotatable and adapted to turn the working shaft, which, in turn, is adapted to change the position of the poles of the switching device.
  • the control shaft of such a switching device is typically substantially transverse relative to the working shaft.
  • limiter means have to be provided in the frame part of the switching device for limiting the rotational angle of the control shaft and/or the working shaft.
  • the object of the invention is to provide a switching device allowing the above-mentioned problems to be solved.
  • the object of the invention is achieved with a switching device, which is characterized in what is stated in the independent claims. Preferred embodiments of the invention are described in the dependent claims.
  • the invention is based on designing and placing the working shaft and the control shaft of a switching device such that one of them passes through the other.
  • An advantage of the switching device of the invention is that no separate limiter means for limiting the rotational angle of the control shaft or the working shaft have to be provided in the frame part.
  • the structure of the switching device of the invention is advantageous as regards the use of space. Furthermore, in certain cases, the invention simplifies the structure of the switching device assembly.
  • FIG. 1 shows the control device module of a switching device according to an embodiment of the invention seen obliquely from above;
  • Figure 2 shows the control device module of Figure 1 seen obliquely from below;
  • Figure 3a shows a shaft element of the control device module of Figure 1 ;
  • ⁇ Figure 3b shows a control shaft of the control device module of Figure 1.
  • a switching device is composed of a control device module and pole cell modules (not shown) connected thereto according to Figure 1.
  • a working shaft 3 and a control shaft 4 are installed in a frame part 2 of the control device module, the control shaft being rotatable and adapted to turn the working shaft, and the working shaft 3 being adapted to change the position of the poles of the switching device.
  • a shaft element 6 in the control device module constitutes part of the working shaft 3 of the switching device.
  • Figure 2 shows that the control shaft 4 extends substantially through the frame 2 of the control device module, and that the control shaft 4 can also be accessed from the bottom of the frame 2 of the control device module.
  • Figure 3a shows a shaft element 6 detached from the control device module of Figure 1.
  • the shaft element 6 comprises a first end 10, a second end 12 and two crossbars 14 interconnecting said first and second end.
  • a gap remains between the crossbars 14 and it passes via the axis of revolution of the shaft element 6.
  • the crossbars 14 are shaped and placed such that, seen from the axial direction, the distance between the crossbars 14 is about 180° on the first side, and about 90° on the other side.
  • the second end 12 of the shaft element 6 is thicker than the first end 10.
  • the crossbars 14 are connected substantially to the periphery of the first 10 and second 12 ends.
  • the shaft element 6 is adapted such that it is able to transfer the power required for opening and closing the poles of the switching device in the direction of both its first end 10 and its second end 12. Accordingly, pole cell modules can be installed in the first end 10 and/or the second end 12 of the shaft element 6.
  • the shaft element 6 is provided with a peg 16 adapted to turn the shaft element 6.
  • the peg 16 is located adjacent to the first end 10 of the shaft element 6.
  • the shaft element 6 is installed in the frame part 2 such that the peg 16 faces the lower part of the frame part 2.
  • Both crossbars 14 of the shaft element 6 are provided with a shoulder 18.
  • the shoulders 18 are adapted to limit the turning of the control shaft 4.
  • the first shoulder is adapted to limit the clockwise turning of the control shaft 4. This shoulder allows the control shaft to turn 90° clockwise relative to the basic position of the control shaft, whereby the control shaft is in a position corresponding to the I position of the switching device.
  • the second shoulder is adapted to limit the anticlockwise turning of the control shaft 4.
  • FIG. 3b shows a control shaft 4 detached from the control device module of Figure 1.
  • the control shaft 4 passes between the crossbars 14 of the shaft element 6 through the shaft element such that the axes of rotation of the working shaft 3 and the control shaft 4 intercept at a substantially 90° angle.
  • the axes of rotation of the working shaft and the control shaft do not intercept, but, however, the working shaft and control shaft are at an angle relative to one another.
  • Tooth means 20 are provided in the control shaft 4 and they are adapted to drive auxiliary contacts (not shown).
  • the tooth means 20 also comprise a limiter tooth 22, which is adapted to cooperate with the shoulder 18 of the crossbar 14 for limiting the rotation of the control shaft 4.
  • the limiter tooth 22 is longer in the axial direction of the control shaft 4 than the other teeth of the tooth means 20.
  • Figure 3b also shows a cam element 24 installed in the lower end of the control shaft 4 and adapted to cooperate with the peg 16 of the shaft element for turning the shaft element 6.
  • the shaft element 6 is installed in the frame part 2 such that said smaller opening (about 90°) between the crossbars 14 faces the lower part of the frame part 2, said larger opening (about 180°) facing the upper part of the frame part 2.
  • the smaller of said openings limits the rotation of the shaft element 6 such that in each extreme position, the corresponding crossbar 14 hits the control shaft 4 thus preventing the shaft element 6 from rotating any farther.
  • the angle between the extreme positions of the shaft element 6 is substantially smaller than the opening between the crossbars 14. This results from the radial dimension of the control shaft 4.
  • the swing angle of the shaft element 6 is dimensioned in a manner allowing the controllable poles of the switching device to be shifted reliably from one position to another.
  • the thickness of the control shaft 4 is dimensioned such that the angle between the extreme positions of the shaft element 6 is about 35°.
  • An about 90° rotational angle of the control shaft 4 corresponds to the extreme positions of the shaft element 6.
  • the frame part 2 of a control device module of the above-described type can be made from a softer material than the control shaft 4 and the shaft element 6, since the frame part 2 does not have to serve as a rotation limiter.
  • the control shaft 4 of a switching device is a pipe shaft, i.e. it is hollow inside.
  • a hole substantially of the shape of e.g. a square can be provided through the control shaft 4 in the axial direction, such a hole being provided in the control shaft 4 shown in the figures.
  • a control shaft 4 of the pipe shaft type can be turned with an inner shaft (not shown) insertable into the control shaft 4.
  • the distance of an actuator, such as an operating handle, from the frame part 2 of the control device can be easily adjusted by gliding the inner shaft in the axial direction relative to the control shaft 4.
  • an actuator such as an operating handle
  • the control shaft 4 of both control device modules can be turned with one sufficiently long inner shaft, which is inserted into the control shaft 4 of both modules. In this case, at least one of said two modules has to be such that its control shaft 4 can be accessed from both its axial ends.
  • Placing two control device modules provided with a tubular control shaft 4 back to back allows a control device for a throw-over switch, for example, to be provided.
  • Such a control device can be of the type I - 0 - II, in which case the turning of the control shaft from the zero position in a first direction closes the first poles, and the turning of the control shaft from the zero position in a second direction closes the second poles.
  • control device modules each comprising a shaft element 6 of Figure 3a and a control shaft 4 of Figure 3b, are employed in a throw-over switch of the type I - 0 - II described above, one shoulder 18 has to be removed from the shaft element 6 of both modules. The shoulder to be removed is the one allowing the control shaft to turn only 45° anticlockwise relative to the basic position of the control shaft.
  • control shaft 4 is able to turn 90° anticlockwise relative to the basic position of the control shaft, whereby the control shaft of the control device module coupled back to back with said module reaches its I position.
  • the turning of the interconnected control shafts 4 in the first direction is limited by the remaining shoulder of the first module, and the turning in the second direction is limited by the remaining shoulder of the second module.
  • the control shafts of two adjacent control device modules can also be interconnected by means of connecting elements provided at the ends of said control shafts.
  • the control shaft 4 passes through the working shaft 3.

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Gear-Shifting Mechanisms (AREA)

Abstract

A switching device comprising a working shaft (3) and a control shaft (4) in-stalled in a frame part (2), the control shaft being rotatable and adapted to turn the working shaft, and the working shaft (3) being adapted to change the posi-tion of poles of the switching device. One (4) of said two shafts (3, 4) passes through the other (3).

Description

SWITCHING DEVICE
BACKGROUND OF THE INVENTION [0001] The invention relates to switching devices according to the preamble of claim 1. [0002] Switching devices are instruments employed for opening and closing an electric circuit. The switching device comprises at least one pole and a control device adapted to open and close said pole. Switching devices include switches and switch-fuses, for example. [0003] A switching device of a known type comprises a control shaft and a working shaft installed in a frame part, the control shaft being rotatable and adapted to turn the working shaft, which, in turn, is adapted to change the position of the poles of the switching device. The control shaft of such a switching device is typically substantially transverse relative to the working shaft. [0004] The problem in the above-described arrangement is that limiter means have to be provided in the frame part of the switching device for limiting the rotational angle of the control shaft and/or the working shaft.
BRIEF DESCRIPTION OF THE INVENTION [0005] The object of the invention is to provide a switching device allowing the above-mentioned problems to be solved. The object of the invention is achieved with a switching device, which is characterized in what is stated in the independent claims. Preferred embodiments of the invention are described in the dependent claims. [0006] The invention is based on designing and placing the working shaft and the control shaft of a switching device such that one of them passes through the other. [0007] An advantage of the switching device of the invention is that no separate limiter means for limiting the rotational angle of the control shaft or the working shaft have to be provided in the frame part. In addition, in certain kind of assemblies, the structure of the switching device of the invention is advantageous as regards the use of space. Furthermore, in certain cases, the invention simplifies the structure of the switching device assembly.
BRIEF DESCRIPTION OF THE FIGURES [0008] In the following, the invention will be described in more detail in connection with preferred embodiments with reference to the accompanying drawings, in which Figure 1 Figure 1 shows the control device module of a switching device according to an embodiment of the invention seen obliquely from above; Figure 2 shows the control device module of Figure 1 seen obliquely from below; Figure 3a shows a shaft element of the control device module of Figure 1 ; and ~ Figure 3b shows a control shaft of the control device module of Figure 1.
DETAILED DESCRIPTION OF THE INVENTION [0009] A switching device according to an embodiment of the invention is composed of a control device module and pole cell modules (not shown) connected thereto according to Figure 1. A working shaft 3 and a control shaft 4 are installed in a frame part 2 of the control device module, the control shaft being rotatable and adapted to turn the working shaft, and the working shaft 3 being adapted to change the position of the poles of the switching device. A shaft element 6 in the control device module constitutes part of the working shaft 3 of the switching device. Figure 2 shows that the control shaft 4 extends substantially through the frame 2 of the control device module, and that the control shaft 4 can also be accessed from the bottom of the frame 2 of the control device module. [0010] Figure 3a shows a shaft element 6 detached from the control device module of Figure 1. The shaft element 6 comprises a first end 10, a second end 12 and two crossbars 14 interconnecting said first and second end. A gap remains between the crossbars 14 and it passes via the axis of revolution of the shaft element 6. The crossbars 14 are shaped and placed such that, seen from the axial direction, the distance between the crossbars 14 is about 180° on the first side, and about 90° on the other side. [0011] The second end 12 of the shaft element 6 is thicker than the first end 10. The crossbars 14 are connected substantially to the periphery of the first 10 and second 12 ends. On the larger part of the stretch between the ends 10 and 12 of the shaft element 6 the distance between the crossbars 14 substantially corresponds to the diameter of the second end 12 of the shaft element 6. The bends of the crossbars 14, intended to change the distance between the crossbars to correspond substantially to the diameter of the first en 10 of the shaft element 6, are provided adjacent to the first end 10. [0012] The shaft element 6 is adapted such that it is able to transfer the power required for opening and closing the poles of the switching device in the direction of both its first end 10 and its second end 12. Accordingly, pole cell modules can be installed in the first end 10 and/or the second end 12 of the shaft element 6. [0013] The shaft element 6 is provided with a peg 16 adapted to turn the shaft element 6. The peg 16 is located adjacent to the first end 10 of the shaft element 6. The shaft element 6 is installed in the frame part 2 such that the peg 16 faces the lower part of the frame part 2. [0014] Both crossbars 14 of the shaft element 6 are provided with a shoulder 18. The shoulders 18 are adapted to limit the turning of the control shaft 4. The first shoulder is adapted to limit the clockwise turning of the control shaft 4. This shoulder allows the control shaft to turn 90° clockwise relative to the basic position of the control shaft, whereby the control shaft is in a position corresponding to the I position of the switching device. The second shoulder is adapted to limit the anticlockwise turning of the control shaft 4. This shoulder allows the control shaft to turn 45° anticlockwise relative to the basic position of the control shaft, whereby the control shaft is in a position corresponding to the testing position of the switching device. [0015] Figure 3b shows a control shaft 4 detached from the control device module of Figure 1. In the control device module of Figure 1 , the control shaft 4 passes between the crossbars 14 of the shaft element 6 through the shaft element such that the axes of rotation of the working shaft 3 and the control shaft 4 intercept at a substantially 90° angle. [0016] In some alternative embodiments, the axes of rotation of the working shaft and the control shaft do not intercept, but, however, the working shaft and control shaft are at an angle relative to one another. Herein, shafts that are at an angle relative to one another refer to shafts that are not parallel. [0017] Tooth means 20 are provided in the control shaft 4 and they are adapted to drive auxiliary contacts (not shown). The tooth means 20 also comprise a limiter tooth 22, which is adapted to cooperate with the shoulder 18 of the crossbar 14 for limiting the rotation of the control shaft 4. The limiter tooth 22 is longer in the axial direction of the control shaft 4 than the other teeth of the tooth means 20. [0018] Figure 3b also shows a cam element 24 installed in the lower end of the control shaft 4 and adapted to cooperate with the peg 16 of the shaft element for turning the shaft element 6. [0019] The shaft element 6 is installed in the frame part 2 such that said smaller opening (about 90°) between the crossbars 14 faces the lower part of the frame part 2, said larger opening (about 180°) facing the upper part of the frame part 2. The smaller of said openings limits the rotation of the shaft element 6 such that in each extreme position, the corresponding crossbar 14 hits the control shaft 4 thus preventing the shaft element 6 from rotating any farther. [0020] It is to be noted that the angle between the extreme positions of the shaft element 6 is substantially smaller than the opening between the crossbars 14. This results from the radial dimension of the control shaft 4. The swing angle of the shaft element 6 is dimensioned in a manner allowing the controllable poles of the switching device to be shifted reliably from one position to another. In the embodiment shown in the figures, the thickness of the control shaft 4 is dimensioned such that the angle between the extreme positions of the shaft element 6 is about 35°. An about 90° rotational angle of the control shaft 4 corresponds to the extreme positions of the shaft element 6. [0021] In the control device module according to the above- described embodiment, the control shaft 4 is adapted to limit the rotation of the shaft element 6, and the shaft element 6 is adapted to limit the rotation of the control shaft 4, and therefore no separate limiter means for limiting the rotational angle of the control shaft 4 or the shaft element 6 are required. The fact that no separate limiter means are required simplifies the structure of the control device module and saves space inside the frame part 2. The frame part 2 of a control device module of the above-described type can be made from a softer material than the control shaft 4 and the shaft element 6, since the frame part 2 does not have to serve as a rotation limiter. [0022] The control shaft 4 of a switching device according to a preferred embodiment of the invention is a pipe shaft, i.e. it is hollow inside. A hole substantially of the shape of e.g. a square can be provided through the control shaft 4 in the axial direction, such a hole being provided in the control shaft 4 shown in the figures. [0023] A control shaft 4 of the pipe shaft type can be turned with an inner shaft (not shown) insertable into the control shaft 4. The distance of an actuator, such as an operating handle, from the frame part 2 of the control device can be easily adjusted by gliding the inner shaft in the axial direction relative to the control shaft 4. [0024] When two control device modules provided with a tubular control shaft 4 are placed coaxially relative to the control shafts 4, the control shaft 4 of both control device modules can be turned with one sufficiently long inner shaft, which is inserted into the control shaft 4 of both modules. In this case, at least one of said two modules has to be such that its control shaft 4 can be accessed from both its axial ends. [0025] Placing two control device modules provided with a tubular control shaft 4 back to back allows a control device for a throw-over switch, for example, to be provided. Such a control device can be of the type I - 0 - II, in which case the turning of the control shaft from the zero position in a first direction closes the first poles, and the turning of the control shaft from the zero position in a second direction closes the second poles. [0026] In case control device modules, each comprising a shaft element 6 of Figure 3a and a control shaft 4 of Figure 3b, are employed in a throw-over switch of the type I - 0 - II described above, one shoulder 18 has to be removed from the shaft element 6 of both modules. The shoulder to be removed is the one allowing the control shaft to turn only 45° anticlockwise relative to the basic position of the control shaft. In this case, the control shaft 4 is able to turn 90° anticlockwise relative to the basic position of the control shaft, whereby the control shaft of the control device module coupled back to back with said module reaches its I position. In such a throw-over switch, the turning of the interconnected control shafts 4 in the first direction is limited by the remaining shoulder of the first module, and the turning in the second direction is limited by the remaining shoulder of the second module. [0027] Alternatively, the control shafts of two adjacent control device modules can also be interconnected by means of connecting elements provided at the ends of said control shafts. [0028] In a switching device according to the above-described embodiment, the control shaft 4 passes through the working shaft 3. It is also feasible to provide a switching device according to the invention, where the working shaft passes through the control shaft. [0029] The structure of the invention wherein one shaft of the switching device passes through another shaft was described above in con- nection with a modular switching device. However, it is evident that, if desired, the structure of the invention can also be used in a switching device wherein the control equipment is placed in the same frame part as the poles of the switch. [0030] It is obvious to a person skilled in the art that the basic idea of the invention can be implemented in a variety of ways. Consequently, the invention and its embodiments are not restricted to the above examples, but may vary within the scope of the claims.

Claims

CLAIMS 1. A switching device comprising a working shaft (3) and a control shaft (4). installed in a frame part (2), the control shaft being rotatable and adapted to turn the working shaft, and the working shaft (3) being adapted to change the position of poles of the switching device, characterized in that one (4) of said two shafts (3, 4) passes through the other (3), and that said shafts (3, 4) are at an angle relative to one another. 2. A switching device as claimed in claim ^characterized in that the control shaft (4) passes through the working shaft (3). 3. A switching device as claimed in claim 1 or 2, character- i z e d in that the axes of rotation of the working shaft (3) and the control shaft (4) intercept. 4. A switching device as claimed in claim 3, characterized in that the angle at which the axes of rotation of the working shaft (3) and the control shaft (4) intercept is substantially 90°. 5. A switching device as claimed in any one of the preceding claims, characterized in that the working shaft (3) and the control shaft (4) are shaped in such a manner that they limit each other's rotational angles to desired values. 6. A switching device as claimed in any one of the preceding claims, characterized in that the control shaft (4) is rotatable from either axial end. 7. A switching device as claimed in claim 6, characterized in that its control shaft (4) is adapted to be connected to a control shaft (4) of another similar type of switching device in a manner allowing the working shafts (3) of both switching device to be turned by rotating the control shaft (4) of one or the other switching device. 8. A switching device as claimed in claim 7,characterized in that the control shaft (4) is a pipe shaft, and in that the control shaft (4) is adapted to be connected to a control shaft (4) of another similar type of switching device by means of an inner shaft insertable into the control shafts.
EP05701747A 2004-01-19 2005-01-18 Switching device Expired - Lifetime EP1709652B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20040067A FI116751B (en) 2004-01-19 2004-01-19 COUPLING
PCT/FI2005/000031 WO2005069323A1 (en) 2004-01-19 2005-01-18 Switching device

Publications (2)

Publication Number Publication Date
EP1709652A1 true EP1709652A1 (en) 2006-10-11
EP1709652B1 EP1709652B1 (en) 2012-08-29

Family

ID=30129398

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05701747A Expired - Lifetime EP1709652B1 (en) 2004-01-19 2005-01-18 Switching device

Country Status (7)

Country Link
US (1) US7679018B2 (en)
EP (1) EP1709652B1 (en)
CN (1) CN1910715B (en)
CA (1) CA2552572C (en)
ES (1) ES2390779T3 (en)
FI (1) FI116751B (en)
WO (1) WO2005069323A1 (en)

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EP2650893A1 (en) 2012-04-12 2013-10-16 ABB Oy Electric current switching apparatus
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DE102012215482B3 (en) * 2012-08-31 2013-12-24 Siemens Aktiengesellschaft Device for actuating electrical switch has housing having external auxiliary switches which are actuated when output shaft and drive shaft are simultaneously actuated with actuation of internal auxiliary switches
CN105336519B (en) * 2014-06-30 2018-12-14 西门子公司 The operating unit and switching device group of switching device
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Also Published As

Publication number Publication date
FI116751B (en) 2006-02-15
CA2552572A1 (en) 2005-07-28
ES2390779T3 (en) 2012-11-16
CN1910715A (en) 2007-02-07
FI20040067L (en) 2005-07-20
WO2005069323A1 (en) 2005-07-28
US7679018B2 (en) 2010-03-16
US20080035464A1 (en) 2008-02-14
CN1910715B (en) 2010-06-23
EP1709652B1 (en) 2012-08-29
CA2552572C (en) 2013-03-26
FI20040067A0 (en) 2004-01-19

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